A hitch ball is a spherical metal component used in towing applications. It is typically mounted on a vehicle's hitch and serves as the connection point for a trailer. The hitch ball allows for easy attachment and detachment of the trailer, enabling safe transport of goods or recreational vehicles. Hitch balls come in various sizes and weight ratings, which are important for compatibility with different trailers. Common sizes include 1-7/8 inches, 2 inches, and 2-5/16 inches. Proper selection of a hitch ball ensures that it can handle the weight of the trailer, contributing to safe towing practices.